OpenSIPS Consulting
OpenSIPS shines as a routing and trunking engine. Zypager helps with routing logic, registrar/location, load balancing, high availability and carrier interconnection.
Problems solved
- Carrier routing and trunking complexity
- Registrar / location scaling
- Load balancing & HA design
- NAT handling & topology hiding
How Zypager helps
- Design routing and carrier-selection logic
- Configure registrar, location and load balancing
- Plan high availability
- Handle NAT, topology hiding and security
Technical areas covered
Typical deliverables
- Routing & HA design
- Carrier integration plan
- Security recommendations
Frequently asked questions
Yes. One-way and no-audio problems are usually in the RTP media path or NAT/SDP handling rather than the signalling. With a SIP trace and the SDP from each leg, the media direction can be followed to the point where it stops.
Yes — Asterisk, FreeSWITCH, Kamailio, OpenSIPS and RTPengine. Many real systems combine them (edge proxy, media relay and application logic), and problems often live at the boundaries between them.
WebRTC-related work may be reviewed separately where it is directly connected to Asterisk, Kamailio, RTPengine or SIP troubleshooting, but it is not currently offered as a standard fixed-price service.
Reading traces is central to how Zypager works. A clear pcap, sngrep or Homer export, plus call details, is often enough to identify the failing transaction without live access.
Yes, on an hourly basis for urgent incidents — failed inbound/outbound calls, RTP/no-audio and carrier problems. Final scope and availability depend on access and complexity.
Related services
Kamailio Consulting
SIP edge routing, registrar and dispatcher built to scale.
RTPengine Consulting
Media relay and SRTP/RTP bridging that actually carries audio.
Asterisk + Kamailio + RTPengine Deployment
A full voice stack — edge, media and application — built and documented.
Not sure which service you need?
Send the symptoms and a call example. The right starting point becomes obvious from the trace.